System information

10-40
Port Status and Basic Configuration
Uni-Directional Link Detection (UDLD)
For example, if you configure port A1 with a friendly port name:
Figure 10-21. Example Listing of the Startup-Config File with a Friendly Port Name Configured (and Saved)
Uni-Directional Link Detection (UDLD)
Uni-directional Link Detection (UDLD) monitors a link between two ProCurve
switches and blocks the ports on both ends of the link if the link fails at any
point between the two devices. This feature is particularly useful for detecting
failures in fiber links and trunks. Figure 10-22 shows an example.
This command sequence
saves the friendly port name
for port A1 in the startup-
config file, but does not do so
for the name entered for port
A2.
In this case, show config lists
only port A1. Executing write
mem after entering the name for
port A2, and then executing
show config again would result
in a listing that includes both
Listing includes friendly
port name for port A1
only.